public class Person {
    private String name;
    private int age;

    // 空参构造
    public Person() {}

    // 全参构造
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // Getter/Setter
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getAge() { return age; }
    public void setAge(int age) { this.age = age; }

    public void show() {
        System.out.println(name + ", " + age);
    }
}